Multiple zone well production apparatus



Jan. 19, 1965 K. F. wENTs E'rAL MULTIPLE zoNE WELL PRODUCTION APPARATUS 6 Sheets-Sheet 1 Filed June 5. 1961 INVENTOR. .IKEA/Erw i.' Pi/vrs tbs-EPH lf3/9L 5y Wt rraPA/ys.

Jan. 19, 1965 K. F. wEN-rs ETAL.

MULTIPLE ZONE WELL PRODUCTION APPARATUS Filed June 5. 1961 6 Sheets-She'et 2 H60 gaa II/GO 20 -FI/'Go INVENTOR.

KEMA/Er# E MGA/rs l rfosspf/ L/BAL #Trae/Veys.

K. F. WENTS ETAL MULTIPLE ZONEI WELL. PRODUCTION APPARATUS Y.

Jan. 19, 1965 6 Sheets-Sheet 5 Filed June 5, 1961 1N VENTORS.

.KENNETH E' W/vrs N L H P L vw. BWM

Jan. 19, 1965 K. F. wENTs ETAL 3,166,125

MULTIPLE ZONE WELL PRODUCTION APPARATUS @Trae/Veys.

Jan. 19, 1965 K. F. wEN'rs ETAL. 3,166,126

MULTIPLE ZONE WELL PRODUCTION APPARATUS 6 Sheets-Sheet 6 K. F. WENTS ETAL MULTIPLE ZONE WELL PRODUCTION APPARATUS Jan. 19, 1965 Filed June 5, 1961 nitecl States Fatenttice 3,'li65,125 MULTIPLE ZONE WELL PRODUCTIN APPARATUS Kenneth F. Wents, vLa Mirada, and Joseph Libal, Glendale, Calif., assig'nors Vto Baiser @il Tools, Inc., Los Angeles, Calif., a corporation oiCaliEornia FiledJnneS, 1961Ser. No. 114,735 20`Cia'in1s. (Cl. 16o-120) The present invention relates to multiple zone we'll production apparatus, and more particularly to well packer apparatus capable of conducting well bore production Afrom a plurality of formation zones through separate parallel tubing Strings to the top of the well bore.

An object of the invention is to provide an improved apparatus for use in conducting Well production from at ,v least three producing zones in a well bore separately unrestricted flow'of uid, and for movement therethrough' of other devices. Y

A further object of the invention is to provide a well packer apparatus having at least three parallel passages through it with which separate parallel tubular strings extending to the top of the well bore can be placed in communication, the packer apparatus being set in the well b'ore by manipulation of the tubular strings, and without the necessity for supporting the apparatus from a lower device, such as a lower packer, set in the well bore.

An additional object of the 'invention is to provide a well packer apparatus having at least three parallel passages through it with which separate parallel tubular strings extending to the top of the well bore can be placed in communication, setting lof the packer apparatus in the well bore being effected by imposing downweight on either one, two or three of such tubular strings, thereby dividing the weight applied between them and preventing buckling of a single tubular string, and at the same time insuring that suliicient downweight can be imposed on the packer apparatus to maintain it set in packed-olf condition. K

Another object of the invention is to provide a well packer apparatus having at least three parallel passages through it with which three lparallel tubular strings can be placed in communication, setting of the packer apparatus in the Well bore being effected by holding one tubular string in tension and imposing downweight on one or both of the other tubular strings, release of the packer being accomplished by elevating the other tubular strings, or if need be, the tubular string originally held in tension.

This invention possesses many other advantages, and has other objects which may be made more clearly apparent from a consideration of several forms in which it FIG. 2 is `a .side elevational View of the upper packer disclosed in FIG. l;

FIGS. 3 and 3a together constitute a longitudinal section through 'the packer illustrated in FIG. 2 with the parts disclosed in a single plane for convenience of illustration, FIG. 3a constituting a lower continuation of FIG. 3; Y

FIG. 4 is an enlarged longitudinal section taken along the line 4-4 on FIG. 2;

FIG. 5 isnan enlarged cross-section taken along the lin'efS-Son FIG. 2; Y

FIG. 6 is 'an enlarged cross-section taken along the line 6 6 on FIG. 2;

FIGS. 7 and 7a together constitute KVa longitudinal section through the apparatus illustrated in FIGS. 3 and 3a, on an enlarged scale, 'illustrating the'packer anchored in packed-off condition in the well casing, FIG. 7a constituting a lower continuation of FIG. 7;

FIGS. 8 and '8a are views corresponding to FIGS. 7 and 7a, respectively, illustrating lthe packer released "from the well casing after having been set therein;

FIGS. 9 and 9a together constitute a longitudinal section of a modilied form of well packer apparatus in condition for movement through a well casing, FIG. 9a constituting a lower continuation ofFlG. 9; and

FIGS. l0 and l0z together constitute a longitudinal section through the apparatus shown in FIGS. 9 and 9a, the packer being set in packed-'oli condition in the well casing. ,Y

As disclosed n FIG. 1, a well bore A has been drilled and casing B set therein. The Well bore is shown as passing through a lower Producing zone C, an intermediate producing zone D and an upper producing zone E, there being lower, intermediate and upper Vperforations F, G, H in the casing communicating with the lower, intermediate and upper zones, respectively. A lower packer I of any suitable type is anchored in packed-ott` condition in the well casing B between the lower and intermediate casing perforations F, G, this packer having a single or first central passage 10 therethrough receiving the lower end Y of a first lower tubing Vstring 11 which may have a head 12 attached thereto adapted to rest upon the lower packer. This lower tubing string extends upwardly and communicates with a first longitudinal passage 13 through an intermediate packer K that can be set in packed-off condition in the well casing B between the intermediate and weight on the packer, and by relatively moving an upper portion of the pack'erwith respect to aV lower portion of may be embodied. Such forms are shown in the drawthe packer, the lower portion being prevented from moving by the lower tubing s'tringll. To permit suchsetting to occur, the lower vtubing string may include atelescopic joint 15. The yintermediate packer K is essentially a hook wall packer 'having theiirst and second parallel passages 13, 14 extendingcom'pletely therethrough, being of any preferred s'pecii'c type. By itself, it constitutes no part of the present invention.

An upper well packer L is set in Ythewell casing E above the upper perforations H Iand is of the specic structureillustrated in FIGS. 2 to V8a or FIGS. 9.toA 10a. This packer L Yhas lirst, seeond and third parallel passages 16, 17, 18 therethrough, there being a first inter- Vmediate tubing string`19 extending between its lirst passage 16 and the lirst passage 13 through the intermediate packer K. A second intermediate tubing string 20 extends between` the second passage `17 in the upper packer and the second passage 14"in the intermediate packer K. TheV third passage 18 in the upper packer L is open to the Patented Jan. 19., 1965 vtop of the well bore.

casing B immediately therebelow and will conduct fluid from the upper Zone E into a third tubing string 21 disv posed in the third passage 18, and which extends to the Similarly, a first tubing string 22, extending to the top of the well bore, coacts wi-th the rst passage 16 in the upper packer; and a second tubing string 23, extending to the top of the well bore, communicates with the second passage 17 Y in the upper packer.

From the foregoing description of FIG. 1, it will be evident that well production from the lower zone C passes into the lower tubing string 11, flowing upwardly into the first passage 13 of the intermediate packer K, through the first intermediate Vtubing string 19 and the first passage 16 in the upper packer L, and then through lthe first tubing string 22 extending to the top of the well bore. The well production from the intermediate zone D fiows through a separate path into the second passage 14 of the intermediate packer K, then continuing upwardly through the second intermediate tubing string 20 to the second passage 17 ofthe upper packer L, from where it ows through the second tubing string 23 to the top of the well bore. Well production 'from the upper zone Hv flows through the Vthird passage 18 inthe upper packer, and through the third tubing string 21 to the top of the well bore.

In the installation illustrated diagramrnatic'allyy in FIG. 1, the lower packer J may be run-in the well casing B and set in place between the lower and intermediate perforations F, G, after which the running-in and setting equipment (not shown) is removed from the Well casing. The lower tubing string 11 of the proper length is then attached to the second packer K and the first and second intermediate tubing strings 19, 20 are also attached to the second packer. The upper Vpacker Lis then secured to thefirst and second intermediate tubing strings 19, 20 and the Vfirst tubing string 22 then attached to the upper packer. The combination just described is run in the well casing B until the lower tubing string 11 enters the first passage 10 of the lower packer I and the tubing head 12 comes to rest thereon. Downweight is then imposed on the first tubing string 22Vwhich will be transmitted through the iirst intermediate tubing string 19 to the second packer K, effecting i-ts anchoring in packed-off condition against the well casingB between the intermediate and upper perforations G, H. Since the first and second'intermediate tubing strings 19, 20 Iare of a proper length, the upper packer L will then be disposed above the upper casing perforations H. The. upper packer can then be anchored in Vpacked-E condition against the well casing B, in the manner described in Vde tail hereinbelow. In general, if the first tubing string 22 is secured to the body of the upper packer, such string may be held in tension and one or both of the other tubing strings 21, 23 then lowered in the well casing and fitted in their respective passages 18, 17,`V whereupon downweight is imposed upon `them forV the purpose of expanding thek gripping members against the well casing, as Well as the packing structure, described hereinbelow. The upper packer L .can assume another form in which the first intermediate tubing string 19 cannot Vmove down-V wardly, because of its being supported by the set intermediate packer K, whereupon downweight can be mposed on the first tubing string 22, or, thesecond and third tubing strings 23, 21 have been positioned in the second and third passages17, 18, downweight can be imposed on all three Vof such tubing strings, or on only one of them, orany two of them, in order to effect an anchoring of the upper packer L' in packed-off condition against the lwall of the well casing, as described here inbelow. Y Y

Infthe upper packer form` L of invention illustrated in FIGS. 2 to 8a, inclusive, the lower portion of the first tubing string 22 may be constituted as a first mandrel or body 25 slidable through a`n upper guide 26 having' a tapered guide surface 27 for guiding the second and third tubular strings 23, 21 into their respective passages 17, 18 in the upper packer. A second tubular body or receptacle 28 is threadedly secured to the guide, as well as a third tubular receptacle or body 29, the second and third receptacles being adapted to receive the lower por-tions of the second and third tubular stringsv 23, 21, respectively. Second and third body extensions 30, 31 are threadedly attached to the second and third receptacles 28, 29, respectively, these body extensions extending into the body 32 of yan anchor device 33, which is to prevent fluid pressure from below the well packer L from moving it upwardly in the well casing B. Thefanchor body 32 has first, second and third longitudinal passages 34, 35,V

36 therein, the first mandrel 25 being slidable in the first passage 34, whereas the second and third body extensions 30, 31 extend into the second and third passages 35, 36, being fixed to the anchor body 32 by a split coupling ring 37 in a'peripheral groove 38 in each body extension, which engages the upper end of the anchor body 32 to prevent downward movement of the extensions relative to the anchor body. Upward movement of `the body extensionsr30, 3,1is prevented by an insert plate 39 through which the extensions pass and the first mandrel 25 is slidable, this plate being fastened against the upper end of the anchor body 32 by a clamp ring 40 threaded on the anchor body and having an inwardly directed fiange 41 engaging-the insert plate 39 to hold it against the Coupling rings 37. Y

n Threaded into and depending from the anchor body 32 are second andthird tubular mandrels or bodies 42, 43 communicating with the second and third passages 35, 36 of the anchor body, respectively. These tubular body members extend downwardly through an upper connector 44 abutting the lower end of the anchor body 32, the connector resting upon split rings 45 mounted in grooves 46 in the second and third mandrels 42, 43. An

upper abutment 47 is clamped against the connector 44 and the split rings 45 by an abutment clamping member 48 threaded on the upper connector 44 and having an inwardly directed flange 49 engaging the upper abutment 47.V In operating effect, the upper abutment 47 and the clamp ring 48 together constitute yan abutment. Such composite abutment engages the upper portion of a packing structure 50, which, as specifically illustrated, in-

cludes a plurality of pliant, elasticA packing elements 51,`

made of rubber or rubber-like material, separatedV by metallic spacer elements 52, vthe lowermost packingelef ment 51 engaging a composite lower abutment 53, 54 f resting initially upon lower split rings 55 disposed in grooves S6 in the second andV third mandrels or body members 42, 43. An abutment clamp ring 54 is threaded onto a lower expander member 57- and has an inwardly thereon which incline in a 'downward and inward direc-` `directed flange 58 engaging the lower abutment 53 to clamp the latter against the upper end of the expander 57.

The expander 57 has tapered expander surfaces 59 tion, cooperating with companion tapered surfaces 60 on slips 61 having externalnwickers or teeth 62 facing predominantlyin a downward direction, sro'as to anchor the well packer L against downward movement in the well i casing B. Relative downward movement of the expanderk 57 lalong the slips 61 will expand the latter outwardly against the well casing B, whereas relative upward movement of the expander along theV slips will effecta retra tion of the latter from the well casing. Such retraction` ment by being coupled to a slip ring 66, the lower end 67' of each slip being ofgenerally inverted T-shape and received within a companion T-shaped generally radially adenine groove 68 in the slip ring. Thus, the slip ring 66 couples the slips 6i for joint longitudinal movement, but permits them to move radially of the ring, the T-shaped heads 67 being slidable in their companion grooves 65. Longitudinal movement of the slips 61 aiong the expander 57 when the slips are being expanded is limited by a stop sleeve 69 on the ring 66 slidable along one of the mandrels 43 and engageable with the expander 57.

The first tubular mandrel or body 25 extends slidably through the upper connector 44, upper abutment 47, packing elements 51, spacers 52 and expander 57, and also extends through the slip ring 66, being coupled to the latter member by a split shear ring 7b having an inwardly directed ange 71 disposed in a peripheral groove 72 in the iirst mandrel 25 and received within a counterbore 73 in the slip ring 66. The rst mandrel 25 is prevented from moving downwardly of the slip ring 66 by a retaining ring 74 through which all of the mandrels 25, 42, 43 pass, which is attached to the slip ring 61 by a plurality of longitudinal extending screws 75 (see FGS. 2 and 4). The lirst mandrel 25 extends downwardly from the slip ring 61 and passes through a lower body structure '76, including an upper retaining portion 77 and a lower ring 78. A split coupling ring 79 is mounted ina peripheral groove 80 in the lirst mandrel 25 and is disposed within a counterbore 81 in the upper body member 77, being held against the upper retaining member 77 by the retaining ring 73. The upper retaining member 77 and retaining ring 7S are secured together by longitudinal screws 82 (FlG. 2). The upper member 77 may have a guide ring 83 threaded thereon which has a desired external diameter, so as to insure the passage of all of the packer parts thereabove in the well casing B. If any restrictions are encountered, they will be engaged by the ring S3, which is indirectly connected to the rst mandrel 25, thereby precluding inadvertent setting of the well packer.

The second and third tubular mandrels 42, 43 pass slidably through the pacldng elements 51, spacers 52 and lower abutment 53, and are also movable relatively downwardly in the expander 57, since their coupling rings 55 are received within enlarged bores 34 in the expander. The second and third mandrels 42, 43 also are slidable vthrough the slip ring 65 and its retaining ring 74, as well as through the lower body structure 76. Initially, however, one of the tubular mandrels 42, 43, such as the second tubular mandrel 42, is releasably coupled to the slip ring 66to prevent setting of the well packer against the well casing until suchY setting is purposely desired. .As illustrated most clearly in l-TGS. 3a, 7a and 8a, a split control ring or cam S5 is mounted in a peripheral groove S6 in the second tubular member 42,this ring being initially disposed within a latch sleeve 87 threaded into the retainer ring 74 and which has depending latch legs S) terminating in inwardly directed ngers S9 which are, at rst, disposed under the cam S5. The upward Vposition of the second mandrel 42 relative to the slip ring 55 may be limited by mounting a stop ring 5b in a groove 91 inA Athe second mandrel 42 engageable with a shoulder 92 on the slip ring, the stop ring 9b being slidable downwardly Vrelative to the slip ring 66 and also being slidable within .tacle 94 is prevented by a suitable side seal ring 95 in Vthe receptacle slidably engaging the periphery of the second mandrel 42. A coupling 96 attaches the second intermediate tubing string 26 to the receptacle 54, this second intermediate tubing string, as described above, extending 6 into the second passage 14-thro`ugh the intermediate packer K. g

The third tubular mandrel 43 is also slidable downwardly through the lower body 76. Thus, the second and third tubular members 42, 43 are slidable downwardly through the lower body 756, but the rst mandrel 25 is attached to the lower body or the coupling ring 79 and ou'sly been set inthe well bore.

the lower retaining ring' 78 and screws 82. The retainer ring 78 may have a threaded box 97 surrounding the third mandrel 43 into which another tubular member (not shown) may be threaded and into which the mandrel 43 would telescope. Y

The anchor portion 33 of the tool is used whenever high pressures in the upper zione E might tend tomove Vthe packer L in an upward direction. The lower slips 61 are capable of anchoring the well packer L against downward movement in the well casing, but not against upward movement. Accordingly, the anchor 33 prevents such upward movement. As shown, the anchor body 32 has a plurality of radial cylinders 100 therein, each cylinder slidably receiving a gripping member or anchor element 101 urged outwardly by uid pressure, to place the upwardly facing wickers or teeth 162 of the gripping element in anchoring engagement with the well casing E. A helical compression spring 103 normally urges each anchor element 191 in an inward direction,'or to retracted position, the inner end of each spring engagingv an anchor element 151 and its outer end a retainer member 1%4 extending longitudinally across a row or set of anchor elements lei and being secured to the anchor body in any suitable manner, as by means of screws 105.

Fluid pressure from one of the zones, such as the upper zone E, will pass into the lower end of the third mand-rel 43 and upwardly `therethrough into the third passage 36 of the anchor body. Ports 106 extend from such third passage 36 to each of the cylinders 101, in order thatuid under pressure from such z'one can act upon the piston elements 161 and urge them outwardly into gripping engagement with the wall of the well casing B, when suficient pressure is present to overcome the force of the retracting springs 103. As shown, leakage of iluid past the piston gripping elements 101 is prevented by piston rings 157 engaging the walls of the cylinders 100. If such pressure is insuflicient to vovercome the force of the springs, the piston elements 101 remain in retracted position. However, the absence of sufficient pressure will merely mean that there is no pressure tending to release the well packer from its anchored condition in the well casing by elevating it. Assuming suicient pressure is present, then it is-necessary to relieve such pressure before releasing the well packer L from the well casing B, in order to remove it from the well bore.

As described above, the lower well packer I has previ,-

The lower tubing string 11 is then secured to the intermediate packer K in communication with its iirst passage 13, the lower tubing string 11 being of a sufficient length such that when its tubing head 12 rests upon the lower packer J, the intermediate packer K will be disposed above the intermediate perforations G in theV well casing and below the upper perforations H. The first and second intermediate tubing: strings 19, 20 are then appropriately secured, to the intermediate packer K and the apparatus lowered in the well casing. With the upper'portion's of the lirst and second intermediate tubing strings 19, 20 still disposed above the topl of the well bore, they are connected to the first tubular mandrel 25 of the upper packer L and to the tube or receptacle 94, respectively. The first tubing lthe upper packer parts being in the relative position illustrated in FIGS. 2, 3 and 3a. Lowering is continued unt-il Vthe lower tubingstring '11 extends through the passage in the lower packer J and its head 12 comes to rest thereupon. The imposition of downweight on the iirst tubing string 22 will now be transmitted directly through the rst intermediate tubing string 19 to the second packer K and effect its anchoring in packed-off condition inthe well casing B above the intermediate perforations G, in a known manner. The first and second intermediate tubing strings 19, 20 have suicient length such that the setting of the packer K -in the well casing B above the intermediate perforations G will locate the upper packer L in the well casing above the upper casing perforations H.

One of the other tubing strings, such as the second tubing string 23, may now be lowered in the well casing and its lower end will engage the tapered guide surface 27 on the head 26, which will direct it 'into the second receptacle 28. It will enter such second receptacle and, if it has latches 111, such latches will snap inwardly and .then pass under a shoulder 112 in the receptacle, at which time a side seal 113 on the lower end of the second tubing string 23k will engage the wall of the receptacle 28 to prevent leakage therebetween. With the first tubing string 22 prevented from moving downwardly/,downweight is imposed on the second tubing string 23, which will exert a downward force on the second tubular mandrel 42 through the body extension 30 and anchor body 32, this downward force being imposed on'the shear screw 93, which is secured to the latch sleeve 97 and, in effect, to the first tubular mandrel 25 through the agency of the retainer ring'74, slip ring 66 andishear ring 70.j When a suicient downward force has been imposed to shear the screw 93, it becomes disrupted, whereupon the cam ring 85 on the second mandrel engages the upper tapered surfaces 115 of the latch legs 8S, 89. The imposition of suicient downward force will now cause the ring 85 to cam or expand the legs 88, 89 outwardly to a releasing position and permit downward movement of the second mandrel 42 within the slip ring66 and latches 88, 89, as well as downwardly within the lower body 76. Such downward movement of the mandrel 42 is accompanied by downward movement of the anchor body 32 and second body extension 30 connected thereto, as well as of all of the other parts connected thereto, including the guide head 26, third receptacle 29, third extension 31 and third tubular mandrel or body 43. In fact, all parts then move downwardly with the exception of the lower body structure 76 and lower tube 94, the slip ring 66, retainer ring 74,

land the first mandrel 25, as well as the slips 61 coupled to the slip ring.

Downward movement shifts the expander 57 downwardly along the slips 61 and expandsV them outwardly into engagement with the well casing B, which will, then preclude further downward movement of the expander 57 and lower abutment 53, 54. Accordingly, continued downward movement of the second tubing string 23 moves the guide head 26 and second and third receptacles 28, 29 downwardly along the first tubular mandrel or body 25, carrying the vbody extensions 30,'31, anchor body 32 and ksecond and third Vrnandrels 42, 43 downwardly with Vit, the upper connector 44 and upper abutment 47 being moved down toward the expander 57 and lower abutment 53 which engages the latter. Accordingly, the packing ystructure 50 is shortened and the packing elements 51 exweight imposed on the structure, in setting the packer L,

of from about 6,000 to 9,000 pounds will insure its appropriate anchoring in packed-ofi condition against the Well casing. VAfter the slips 61 have been expanded against the casing, the additional downward force to expand the packing elements 51 againstthe Well casing B is not imposed upon the rst mandrel 25 and the *first tubing string 22 secured thereto.

After the upper packer L has been anchored in packedoff condition in the well casing, such as disclosed in FIGS. 7 and 7a, the third tubular string 21 is lowered through the well casing B alongside the first and second tubing strings 22, 23. Its lower end will engage the tapered surface 27 on the guide head 26, which will direct it into the third receptacle or body 29. This third string may also have latches thereon which will be forced inwardly past the shoulder 121 in the third receptacle until they pass therebelow, which will then prevent upward removal of the third string 21 from the receptacle 29 unless a predetermined force is imposed thereon. The lower end of the third string 21 also has a suitable side seal 122 Vengaging the wall of the receptacler29 to prevent leakage therebetween.

Prior to setting of the well packer L in the well casing, if desired, the second tubing string 23 may be lowered in the well casing and located in its second receptacle 28, followed by lowering of -the third tubular string 21 in the well casing and its reception in its third receptacle 29..

With the upper packer L anchored in packed-off condii tion, and in view of the fact that the lower packer I and intermediate packer K have previously been anchored in packed-off condition in the well casing, the well production from the lower zone G will flow into the lower tubing string 11 and through the first passage 13 of the intermediate packer K into the first intermediate tubing string 19, continuing upwardly through the first tubular mandrel 25 to the iirst tubing string 22 that extends Yto the top of the well bore. The well production from the intermediate or second zone lD will pass into the second passages 14 in the intermediate packer K and then through the second intermediate tubing string 20, flowing into the second passage 17 (in the parts 94, 42, 32,

30, 28) through the upper packer and into the second tubing string 23, which extends to the top of the well bore. The production from the upper zone E will flow into the third passage 18 (in the parts 43, 32, 31, 29) in the upper well packer and then to the Vthird tubing string 21 that extends to the top of the well bore. Accordingly, production from the zones C, D, E is conducted through separate and distinct paths through the parallel tubing strings 22, 23, 21 to the top of the well bore, there being no commingling therebetween.

In the event that the pressure in the upper zone acts ou the upper packer L and tends to unset it, such action is precluded since the uid under pressure from the upper zone E is also present in the -third passage 18 (36) in the upper packer. Such fluid under pressure passes through the ports 106 into the anchor cylinders 101, urging the anchor and gripping elements 101 outwardly into engagement with the wall of the well casing B, and there-V by preventing upward movement'of the anchor body 32 in the casing, as well as the remainder of thepacker L.

VIn the event it is desired to release and retrieve the upper packer L, the pressure in the third passage 36 of the anchor body 32 shouldbe relieved. VThis can be accomplished by.k exerting an upward pull on the third tubular string 21, its latches 120 snapping past the shoul` der 121 and allowing it to be removed from the third receptaclel 29. Accordingly, the pressure below the upper packer L can now pass through its third passage 18 -to the region thereabove, equalizing the pressure on both `sides of the packer and Aacross the anchor gripping ele-r ments 101, which will allow the springs 103 to shift such gripping elementsto their retracted position.

After the third string 21 has been removed from its 9 receptacle 29, and the pressure equalized across the upper packer L, an upward pull is taken on the second tubular string 23, to release the well packer L. The latch device 111 holding the lower portion of the second string 23 in the second receptacle 28 may require a suicient force, before it will move past the shoulder 112 in the receptacle,in order to disconnect the second tubing string from the well packerz For example, if about 6,000 pounds is required to release the latch 111 from the receptacle 28, theV taking of an upward strain on the second string of less than that amount will ordinarily result in upward movement of the receptacles 28, 29, body extensions 30, 31, and anchor body 32 and upper abutment 47 along the rst tubular mandrel 25. When the upper abutment 47 moves away from the lower abutment 53, the packing elements 51 can inherently move inwardly into their retracted position. Continued upward movement of the second tubular string 23 will move the parts upwardly with it, including the second and third tubular mandrels 42, 43, until the limit rings 55 engage the lower abutment 53, which will then move the expander 57 upwardly with it relative to the slips 61, the tongue and groove interconnection 63, 64 between the slips and expander causing the slips to shift to their retracted position. When the slips 61 are being slnfted to their retracted position, the cam 85 on the second mandrel engages the tapered surfaces 130 at the lower ends of the latch fingers 89, expanding such ngersoutwardly and relocating the cam 85 above the latch fingers, or in their initial latching position, which will then preclude inadvertent downward movement of the tubular mandrel 42 relative to the slip ring 66 and slips 61, which might produce resetting of the packer parts.

With the slips 61 fully retracted, the taking of a sufficient strain on the second tubing string 23 will cause its latch 111 to snap out of the receptacle 28, allowing the second tubular string 23 to be removed from the well casing. Thereafter, the first tubular string 22 is elevated, which will elevate the upper well packer L in the well casing. Upward movement of the llirst tubular string 22 and its mandrel 25 will alsoV eiect release of the intermediate packer K, in a known manner, causing such intermediate packer, together with the first and second intermediate tubing strings 19, and the lower tubing string 11, to be elevated in the well casing B and removed entirely therefrom.

In the event that the well packer L does not release upon the taking of a strain on-the second tubing string 23, as described above, due, for example, to sand or junk in the well casing above the upper Well packer, a pull is taken on the first tubular string 22 of a sufficient amount to shear the inner flange 71 of the shear ring 71) yfrom its outer portion, which is secured to theslip ring 66. As an example, a pull of 20,000 pounds on the iirst tubular string 22 may be required to shear the ring 7l). When the ring 70 shears,` the rst tubular string 22 and mandrel 25 move upwardly suddenly, causing a retracting ring 145, secured in a peripheral groove 146 on the iirst mandrel 25, and initially spaced below the guide head 26, to move upwardly suddenly and strike a'blow on the head 26 shiftingY the head upwardly, as well as all of the parts connected and depending therefrom; Such upward shifting is accompanied by upward movement of the second and third receptacles 28, 29, second and third body extensions 3i), 31, anchor body 32 and upper connector 44 and upper abutment 47, the latter moving away from the lower abutment 53 and` allowing the packing elements 5,1 to shift to their retracted position, and also 89 (FIGS. 8, 8a). The elevating movement of the rst tubular string 22 will alsoautom'ati'cally release the intermediate packer K. The engagement of the retracting ring 145 with the head 26 will cause continued elevation of the rst tubular string 22` to elevate the upper and intermediate packers L, K with it in the well b'or'e, as well as the first and second intermediate tubing' strings' 19, 20 and lower tubing string 11.

In the form of invention illustrated in FIGS. 9 to' 10a, inclusive, the upper packer L is set by virtue of its being supported by the set` intermediate packer K. A downward weight is imposed on any one, or a plurality, of the tubular strings 2'1, 22, 23 extending Lto the top of the well bore. The general relationship of parte isthe same as in the other form of the invention, except that the first tubular mandrel 25d is secured to move jointly with the second and third tubular mandrels 42a, 43a by coupling it to the upper connector 44. The irst tubular mandrel 25a has a split ring 160 mounted in its peripheral groove 161 and received' within a counterbor'e 162 in the upper connector 44, the ring 160b`ein`g held Iin position by the upper abutment 47 fn the same manner as the coupling rings securing the second andk third mandrels or body members 42a, 43a to the upper connector. All of the tubular mandrels 25a, 42a, 43a are s'lidable through the packing structure 50 and slip ring 66, one of the tubular mandrels, such as the first tubular mandrel 25a, being releasably latched to the slipA ring 66V in essentially the same manner as the second tubular mandrel 42 of the other form of invention was releasably latched to this slip ring.

Thus, a cam or ring S5 is mounted in a groove 86 in the rst mandrel 25a arid is disposed within the latch sleeve S7, being initially located above the latch fingers 89, the latch sleeve being threaded into the retainer ring 74. The iirst, second and third tubularl members 25a, 42a, 43a are siidable through the slip ring 66 and retainer ring 74. They are received in a lower bo'dy structure 76a, which includes three tubes or receptacles 174), 171, 172. Thus, a tube or receptacle 170 is threadedly attached to the body member 78a and depends therefrom, the iirs't intermediate tubing string 19 being suitably connected to such receptacle. The second mandrel 42u is slidable in a second tube or receptacle 171 secured in the bodyv member 78a, the second intermediate tubing string20 being appropriately attached tothe second receptacle 171. The third mandrel 43a is slidable in the third receptacle 172 threadedly secured in the body member 78a, this third receptacle terminating below the upper packer L so that fluid from the upper Zone E and upper set of perforations H can flow thereinto. The lower body 76a in which the r'st, second and third mandrels 25a, 42a, 43a telescopically iit is secured to the slip ring 66 by means of intermediate longitudinal studs 180, the upper portion of which is threaded in the slip ring 66and the lower causing' the limit rings 55on the second and third many drels 42, 43 to engage the expander 57 and pullV it( portion of which extends through the body member 78a, a suitabie nut 131 clamping the stud to the body member 78a and holding the body member against-a stud shoulder 182, and aA stud shoulder 183 against the retainer ring 74, as shown in dotted lines inFIGSa and 10a.

The upper packer L is'connected to the iirst tubular string 22, with its partsv in the' retracted positions disclosed in FIGS. 9 and 9a, andis lowered in thew'ellcasing i B until the desired setting point is reached.' The first and second intermediate tubing strings 19, 20 will be properly related to the intermediate packer K andV will be supported by the latter, which precludesrdownward movement of the lower bodyV member 73a and the lower vslipring 66. Accordingly, the imposition of suflicient jdownweightron the first tubular string 22 will cause the cam ring to expand the latch fingers i89 outwardly, which will then carry all of the entire packerrstructure,

with the exception of the lower body 76u and slip structureV radially outwardly into anchoring engagement'witli ,the

'26, being directed into the second receptacle 2S.

wall of the well casing B. The continued imposition of downward force on the tubing string 22 will cause the upper abutment 47 to move toward the lower abutment 53 and expander 57 to shorten Vthe distance therebetween and expand the packing elements 51 outwardly into sealing engagement with the wall of the well casing. During setting of the packer L, the mandrels 25a, 42a, 43a telescope within their respective receptacles 170, 171, 172, leakage therebetween being prevented bythe side seals 95 (FIGS. 10, a). The second tubingstring 23 may then be lowered in the well casing B and will'engage the guide' head The third tubing string 21 cannow be lowered in the well casing B and will engage the guide surface 27 and be directed into the third receptacle 29. The well production from the three zones C, D, E will now liow through three separatewpaths and through the irst, second and third tubular strings 22,23, 21 `to the top of the well bore, in the same manner as described in connection with the other form of the invention.

If the pressure in the upper zone E tends` to elevate the upper packer L in the well casing, such pressure will pass through the third passage 18, (36) into the cylinders 101 and expand and hold the gripping elements 101 outwardly in anchoring engagement with the well casing B, thereby preventing the packerL from being moved upwardly.

When it is desired to release the well packer L, the third tubular string 21 is first pulled from its receptacle 29, in the manner described above in connection with the other form of the invention, to equalize the pressure above and below the packer and lallow the abutment anchor elements 101 to be retracted by the springs 103. Thereafter, an upward pull is taken on the rst tubing string 22, which will move the upper abutment 47 away from the lower abutment 53, allowing the packing elements 51 to shift to their retracted positions. When the limit rings 55 on the second and third tubular mandrels 42a, 43a engage the lower abutment 53, the expander 57 is moved upwardly relative to the slips 61, shifting the latter to their retracted positions, at which time the cam element 85 will have snapped upwardly past the latch ingers 89 to its initial position, precluding inadvertent downward movement of the mandrels 25a, 42a, 43a relative to the other packer parts and resetting of the packer.V Upward movement of the mandrel 25a carries v Ato its desired setting location on the first tubular string 22 and, before setting occurs, the second tubular string .23 and the third tubular string'21 can be loweredand inserted in their second and third receptacles 28, 29.

Thereafter, setting can occur by imposing downweight ,i on all-three tubing strings 21, 22, 23, ifV desired, or on Y any .one or any two of such tubing strings, such downweight being distributed, if desired, between the tubing strings, and being imposed through the upper abutment 47 and the packing structure 50 on the expander 57, first releasing the latch 88, 89 and then moving the expander downwardly relative to the slips 61,\anchoring the latter `against the well casing. Such anchoring is followed by shifting of theupper abutment 47 toward the lower abutment 53 to shorten the packing elements 51 and expand them outwardly against the wellcasing B. If desired,

the downward force can be maintained on all threert'ubing strings 21, 22, 23, or on one or more ofthem.

In effecting release of the well packer from the well casing, the third tubular string 21 may be pulled Vfrom its receptacle 29 to equalize the pressure and allow the anchor elements 101 to be retracted bythe springs 103. Thereafter, an upward strain, if desired, may be taken on both the i'irst and second tubing strings 22, 23k to eiect retraction of the packing elements 51 and the slips 61, and the relatching of the iirst tubular mandrel 25a` in its initial position shown in FIGS. 9 and 9a, which will `retain all of the'partsretracted'. The second tubing string k23 can then be removed from its receptacle 28 and removed from the wellcasing B, after, which the upper packer L, and the parts therebelow, are elevated in the well casingV and removed therefrom by elevating Vthe first tubing string 22.

We claim:

l. In well apparatus adapted to be set in a well bore: rst, second and third parallel tubular body members adapted to be placed in communication with first, second and third tubular strings extendingto the top of the well bore; an expander on said body members; slip means engaged by and movable outwardly by said expander to anchor the well apparatus in the well bore; means securing said rst body member to said slip means; said second and third body members being movable longitudinally of said slip means; and means for transmitting the longitudinal movement of said second and third body members to said expander to move said expander longitudinally of said slip means and first body member to expand said slip means.

2. In well apparatus adapted to be set in a wellbore: first, second and third parallel tubular body members adapted to be placed in communication with iirst, second and third tubular strings extending to the top of the well bore; an expander on said body members; slip means engaged by and movable outwardly by said expander to anchor the well apparatus in the well bore; means securing said first body member to said slip means; said second body member being movable longitudinally of said slip means; means for transmitting the longitudinal movement of said second body member to said expander to move said expander longitudinally of saidslip means and rst body member to expand said slip means; and releasable latch means releasably securing said slip means to one of said second and third body members to initially prevent expansion of said slip means.

3. In well apparatus adapted to be set in a well bore:-

first, second and third parallel tubular body membersY adapted to be placed in communication with rst, second and third tubular strings extending to the top of the well bore; an expander on said body members; slip means engaged by and movable outwardly by said expander to anchor the vwell apparatus in the well bore; means releasably securing said rst body member to said slip means; said second and third body members being movable longitudinally of said slip means; means -for transmitting the longitudinal movement of said second and third body members to said expander to move said expander longitudinally of` said slip means and rst body member to expand said slip means; and means for transmitting movelease of said securing means, to shift said expander relative to said slip means and retract said slip means.l

4. In well apparatus adapted to be set in a wellbore: rst, Vsecond and third parallel tubular body members adapted to be placed in communication with first, second and ,third tubular strings extending to the top of the well bore; an expander on said body members; slip means engaged by and movable outwardly by said expander to anchor the well apparatus in the well bore; means releasably securing said first body member to said slip means; said second body member being movableY longitudinallyof said slip means; means for ,transmitting movement of said first body member to said expander, after release of said securing means, to shift said expander relative to said slip means and retract said slip means; and releasably latch means securing said slip means to i3 one of said second and third body members to initially prevent expansion of said slip means. i

5. In well packer apparatus adapted to be set in a Well bore: first, second and third tubular body members adapt-` ed to be placed in communication with first, second and third tubular strings extending to the top of the well bore; normally retracted packing means on said body members; an expander movable on said body members below said packing means; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against downward movement; means securing said first body member to said slip means; said second and third body members being movable longitudinally of said slip means; and means for transmitting downward movement of said second and third body members to said packing means to move said expander longitudinally of said slip means and first body member to expand said slip means and to expand said packing means.

6. In well packer apparatus adapted to be set in a well bore: first, second and third tubular body members adapted to be placed in communication with first, second and third tubular strings extending to thetop of the Well bore; normally retracted packing means on said body members; an expander movable on said body members below said packing means; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the wellv bore against downward movement; means securing said first body member to said slip means; said second body member being movable longitudinally of said slip means; means for transmitting downward movement of said second body member to said packing means to move said expander longitudinally of said slip means and first body member to expand said slip means and to expand said packing means; and releasable latch means releasably securing said slip means to one of said second and third body members to initially prevent expansion of said slip means.

7. In well packer apparatus adapted to be set in a Well bore: first, second and third tubular body members adapted to be placed in communication with first, second and third tubular strings extending to the topof the well bore; normally retracted packing means on said body members; an expander movable on said body members below said packing means; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against downward movement; means releasably securing said first body member to said slip means; said second body member being movable longitudinally of said slip means; means for transmitting downward movement of said second body member to said packing means to move said expander longitudinally of said slip means and first body member to expand said slip means and to expand said packing means; releasable latch means releasably securing said slip means to one of said second and third body members to initially prevent expansion of said slip means; and means for transmitting upward movement of said first body member to said second body member, after release of said first body member from said slip means, to retract said packing means and slip means.

8. In well packer apparatus adapted `to be set in a well bore: rst, second and third tubular body members adapted to be placed in communication with first, second and third tubular strings extending to the top of the well bore; normally retracted packing means on said body members; an expander movable on said body members below said packing means; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against downward movement; shearable means releasably securing said first body member to said slip means; said second body member being movable longitudinally of said slip means; means for transmitting downward movement of said second body member to said packing means to move said expander longitudinally of saidV slip means and first body member to expand said slip means and to expand said packing means; releasable latch means releasably securing said slip means to one ofi said secondfand third body members toV initially prevent expansion of said slip means; and means for transmitting upward movement of said first body member to said second body member, after shearing ofsaid shearable means to release said first body memberfrom said slip means, to retract said packing means and slip rneans.

9. In well packer apparatus adapted to be se't in a well bore: first, second and third tubular body members adapted to be placed in communication witlrfirst, seciond and third tubular strings extending to the top rof the wellbor'e; means connecting said second and third body members for joint longitudinal movement; normally retracted packing means on said body members below said connecting means;l an expander below said packing means and movable on said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore' againstdownward movement; means securing said rst body member to said slipmeans; said second and third body members being movable longitudinally 'of said slip means; said connnecting means being movable downwardly of said first body member to move said packing means and, expander` downwardly of said slip `means to expandV said slip means and to expand said packing means.

10. In well packer apparatusa'dapted to be set. in a well bore: first, second and third tubular body members adapted to be placed in communicationwith first, second Vand third tubular strings extending to the top of the well bore; means connecting said vsecond and third body members for joint longitudinal movement; Vnormally retracted packing means on said body members below said connecting means; an expander belowsaid body member engaging said connecting means, afterV release of said securing means,V to elevate said connecting means, body members and Yexpander to effect retraction of said packing means and slipmeansa *11; In well `packer apparatus adapted to be set in a well bore: first, second and third tubular body' members adapted to be placed in communication with first, second and third tubular strings extending to the topv of the well bore; means connecting said second'and third body members for joint longitudinal movement; normally retracted packingmeans o'n said body members below said connecting means; an expander below said packing means Vand movable on said bdy members; slip means' below said expander and engaged and movable outwardly by said expander to anchorthe well apparatu's in the well bore against c'lo'wnvvard movement; means adapted to prevent "downward movement of, said slip means; at least one' of vsaid body members being movable longitudinally 'Vof said slipmeans; said connecting means being movable r'downwardly to move said packing means and expander downwardly of said slip means to expand said slip means and tb expand said packing means. f

12. In well packer apparatus adapted toV be set in a well bore: first, Ysecond-Vand'tliirdV tubular :body niemb'e'rs adapted to be placed in communication with first, sec# means adapted, to prevent downward movement of said slip means; at least one of said bodymembers being movable longitudinallyof said slip means; said connecting means being movable downwardly to move said packing means .and expander downwardly of said slip means to expand said slip means and to expand said packing means; and releasable latch means releasably securing said slip means to one of said bodyV members to initially prevent expansion of said slip means.

13. In well packer apparatusV adapted to be set in aY well bore: first, second. and third tubular body members adapted to be placed in communication with rst, sec- `ond and third tubular strings extending to the top of the well bore; means connecting said first, secondV and third body members for joint longitudinal movement; normally retracted packing means on said body members below said connecting means; an expander below said packing means and movable on said body members; slip means belowsaid expander and engaged and movable "outwardly by said Yexpander to anchor the well apparatus in the well bore against downward movement; meansadapted to prevent downward movement of said slip means; said first, second and third body members beingV movable longitudinally of said slip means; said connecting means being movable downwardly to move said packing means and expander downwardly of said slip means toY expand. said slipmeans Vand to expand said packing means.

14. In well packer apparatus adapted tobe set in a well bore: first, second and third tubular body members adapted to be placed in communication with first, second and third tubular strings extending to the top of the kwell bore; means connecting said -first,-second and third body members for joint longitudinal movement; normally retracted packing means on said body members below said connecting means; an expander below said packing means and movable on said bodyV members; slip means below said' expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against' downward movement;

`means adapted to prevent downward movement of said slip means; said first, second` and third body members` being movable longitudinally of said slip means; said connecting means being movable downwardly to move 4said packing means and expander downwardly of said slip means to yexpand said slip means and to expand said packing means; and releasable latch means releasably i.

securing said slip means to oneof said body members to initially prevent expansion of said slip means.

15. In wellpacker apparatus adapted to be set in a well bore: first,.second and third tubular body members adapted to be placed in communication with first, second i and third tubular strings extending to the top of the well b ore; means connecting said irst,seco nd and third body members for joint longitudinalmovement; normally retracted packingvmeans on said body members below said connecting means; an expander below said packing means and movable-on said body members; slip means below said expander and engaged and movable outwardly by Y said expander to anchor the well apparatus in the well bore against downward movement; a lower body structure telescopically receiving said first, second and third body members and connected to Ysaid slip means to prevent downward movementrof said slip means; said first,

j second and third body members being movable longi- A' tudinal'ly oi said slipmeans; said connecting means being bore: first, second and third tubular body members adapted to be placed in communication with first, second and third Vtubular strings extending to the top of the well bore; means connecting said first, second and third body members-for joint longitudinal movement; normally retracted packing means on said body members below said connecting means; an expander below said packing means and movable on said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against downward movement; a lower body structure telescopically receiving said first, second and third body members and connected Vto said slip means to prevent downward movement of said slip means; said first, second and third body members being movable longitudinally of said slip means; said connecting means being movable downwardly to move said packing means and expander downwardly of said slip means to expand said slip means and to expand said packing means; and releasable latch means releasbly. securing said yslip means to one of said body members to initially prevent expansion of said slip means.

. 17. In well packerv apparatus adapted to be set in a well bore: first, second and third tubular body members yconnecting means; an expander below said packing means and movable on said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well Ybore against downward movement; a lower body structure telescopically receiving said first, second and third body membersrrand connected to said slip means to prevent downward movement of said slip means; said first, second and third body members being movable longitudinally of Vsaid slip means; said connecting means being movable downwardly to move said packing means and expander Vdownwardly of said slip means to expand said slip means and to expand said packing means; said lower body struc- .ture including first, second and third tubular means receiving said first, second and third body members, re spectivelyyin leak-proof relation.

18. In wellpacker apparatus adapted t0 be set in a well bore: an upper structure having first, second and third passages; a first tubular body member extending through said first passage; second and third tubular bodyy 'members connected to said structure in communication with saidl second and third passages, respectively; said first tubular body member being adapted to be'connected Vto a first tubular stringextending to the top of the `well bore; said second and third passages being adapted to` receive second andv third tubular strings, respectively, extending to the top of the well bore; normally retracted packing means on said body members below said structure; an expander below said packing means and movable onY said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in the well bore against downward movement; means adapted to prevent downward movement of said'slip means; at least one of said body members being movable longitudinally of said slip means;

said structure vbeing movable downwardly with said second and third tubular body members connected thereto to f move said packing meansand expander downwardly of said slip means to expand said slip means and to expand said packing means.

19. In well packer apparatusA adapted to be set in a third passages; a lirst tubular body member extending through said first passage; second and third tubular body members connected to'said structure in communication with said second and third passages, respectively; said first tubular body member being adapted to be connecte-d to a first tubular string extending Ato the top of the well bore; said second and third passages being adapted `to receive second and third tubular strings, respectively, extending to the top of the well bore; normally retracted packing means on said body Amembers below said structure; an expander below said packing means and movable on said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus inthe well bore against downward movement; means securing said iirst body member to said slip means; said second and third body members being movable longitudinally of said slip means; said structure being movable downwardly to move said second and third body members longitudinally of said slip means and to move said packing means and expander downwardly of said slip means to expand said slip means and to expand said packing means.

20. In well packer apparatus adapted to be set in a well bore: an upper structure Yhaving rst, second and third passages; a iirst tubular body member extending through said first passage; second and third tubular body members; said first, second and third tubular body members being connected to said structure with said second and third tubular body members in communication with said second and third body passages, respectively; said 18 rst tubular body member being adapted to be connected to a rst tubular string'extending to the top of the well bore; said second and third passages being adapted to receive second and third tubularv strings, respectively, ex-

tending to the top of the well bore; normally retracted' packing means on said body members below said structure; an expander below said packing means and movable on said body members; slip means below said expander and engaged and movable outwardly by said expander to anchor the well apparatus in Vthe well bore against downward movement; said rst, second andV third body members being movable longitudinally of said slip means; a lower body structure telescopically receiving said iirst, second and third body membersfand connected to said slip means to prevent downward movement vof said slip means; said upper structure being movable downwardly in response to downward movement imposed on at least one of the tubular strings to move said packing means andl expander downwardly of said slip means to expand said slip means and to expand said packing means.

References Cited in the tile of this patent UNITED STATES VPATENTS Myers June 18, 1963 

1. IN WELL APPARATUS ADAPTED TO BE SET IN A WELL BORE: FIRST, SECOND AND THIRD PARALLEL TUBULAR BODY MEMBERS ADAPTED TO BE PLACED IN COMMUNICATION WITH FIRST, SECOND AND THIRD TUBULAR STRINGS EXTENDING TO THE TOP OF THE WELL BORE; AN EXPANDER ON SAID BODY MEMBERS; SLIP MEANS ENGAGED BY AND MOVABLE OUTWARDLY BY SAID EXPANDER TO ANCHOR THE WELL APPARATUS IN THE WELL BORE; MEANS SECURING SAID FIRST BODY MEMBER TO SAID SLIP MEANS; SAID SECOND AND THIRD BODY MEMBERS BEING MOVABLY LONGITUDINALLY OF SAID SLIP MEANS; AND MEANS FOR TRANSMITTING THE LONGITUDINAL MOVEMENT OF SAID SECOND AND THIRD BODY MEMBERS TO SAID EXPANDER TO MOVE SAID EXPANDER LONGITUDINALLY OF SAID SLIP MEANS AND FIRST BODY MEMBER TO EXPAND SAID SLIP MEANS. 